| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nonlinear resistor at a low cost and to provide a method for manufacturing the same. <P>SOLUTION: The nonlinear resistor comprises a zinc oxide (ZnO) as a main component and also comprises as additives 0.66-0.8 mol% of a bismuth oxide (Bi<SB>2</SB>O<SB>3</SB>), 0.05-0.2 mol% of an antimony oxide (Sb<SB>2</SB>O<SB>3</SB>), 0.033-0.67 mol% each of a cobalt oxide (Co<SB>3</SB>O<SB>4</SB>) and a manganese oxide (Mn<SB>3</SB>O<SB>4</SB>), 0.01-0.5 mol% of a chromium oxide (Cr<SB>2</SB>O<SB>3</SB>), 0.4-2 mol% of a boric acid (H<SB>3</SB>BO<SB>3</SB>), and 0.001-0.01 mol% of an aluminum nitrate (Al(NO<SB>3</SB>)<SB>3</SB>-9H<SB>2</SB>O). The method for manufacturing the nonlinear resistor comprises steps for forming an element assembly 1 in which the total of the main component and the additives is 100 mol%, burning an electrode surface at a temperature of 950-1,050°C without being in contact with a burn table, forming a high resistance layer 2 on side faces of the assembly 1 at a thickness of 50-100μm by providing glass which has been obtained by vitrifying low melting glass at a temperature of 500-600°C, and thereafter forming an electrode 3 throughout the entire electrode-forming surface without polishing the same. Thus, since burning can be carried out at a lower temperature comparing with a conventional process in which burning is carried out at a high temperature of 1,200°C, the nonlinear resistor can be manufactured at a low cost. <P>COPYRIGHT: (C)2004,JPO |
